Rooter

(n.) One who, or that which, roots; one that tears up by the roots.

Thesaurus Entries

adherent, admirer, amateur, applauder, appreciator, booster, buff, claqueur, collector, commender, devotee, dilettante, encomiast, eulogist, eulogizer, extoller, fan, fancier, follower, groupie, idolater, idolizer, lauder, panegyrist, plugger, praiser, promoter, puffer, tout, touter, votary, worshiper